/* ── Theme variables ── */
:root {
  --bg: #f5f5f5;
  --bg-card: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #666;
  --border: #e0e0e0;
  --shadow: rgba(0, 0, 0, 0.08);
  --green: #22c55e;
  --red: #ef4444;
  --blue: #3b82f6;
  --orange: #f97316;
  --soc-bg: #e5e7eb;
  --header-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111117;
    --bg-card: #1c1c24;
    --text: #e4e4e7;
    --text-secondary: #9ca3af;
    --border: #2e2e38;
    --shadow: rgba(0, 0, 0, 0.3);
    --soc-bg: #374151;
    --header-bg: #1c1c24;
  }
}

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

/* ── Summary Bar ── */
#summary-bar {
  display: flex;
  gap: 16px;
  padding: 0 24px 12px;
  font-size: 0.8rem;
}
.summary-item { color: var(--text-secondary); }
.summary-item.on { color: var(--green); }
.summary-item.off { color: var(--red); }
.summary-item.offline { cursor: pointer; opacity: 0.6; }
.summary-item.offline:hover { opacity: 1; }
.summary-item.filtered { text-decoration: line-through; }

/* ── View Toggle ── */
#view-toggle {
  margin-left: auto;
  display: flex;
  gap: 2px;
}
.toggle-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.1rem;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.toggle-btn:first-child { border-radius: 8px 0 0 8px; }
.toggle-btn:last-child { border-radius: 0 8px 8px 0; }
.toggle-btn.active { background: var(--border); }
.toggle-btn:hover:not(.active) { background: var(--soc-bg); }

#refresh-btn {
  margin-left: 8px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
#refresh-btn:hover { background: var(--border); }

#back-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.875rem;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
}
#back-btn:hover { background: var(--border); }

/* ── Station Grid ── */
#station-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: 16px;
  padding: 24px;
}

/* ── Station Card ── */
.station-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.station-card:hover {
  box-shadow: 0 4px 16px var(--shadow);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.normal { background: var(--green); }
.status-dot.offline { background: var(--red); }

.card-name {
  font-weight: 600;
  font-size: 1rem;
  flex: 1;
}

/* PV generation in header row */
.card-pv {
  margin-left: auto;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 4px;
  background: #eab308;
  border-radius: 6px;
  padding: 2px 8px;
}
.card-pv .unit {
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 2px;
}
.card-pv.zero {
  color: var(--text-secondary);
  background: none;
}
.icon-pv {
  filter: brightness(0) saturate(100%) invert(15%) brightness(130%);
}
.card-pv.zero .icon-pv {
  filter: brightness(0) saturate(100%) invert(50%) brightness(120%);
}

/* Offline card */
.card-offline {
  opacity: 0.7;
}
.offline-label {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--red);
  text-align: center;
  padding: 16px 0;
}

/* Battery power (primary metric on card) */
.card-battery-power {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.card-battery-power .unit {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 4px;
}
.card-battery-power .batt-arrow {
  font-size: 1rem;
  margin-right: 4px;
}
.card-battery-power.discharging { color: var(--text); }
.card-battery-power.charging { color: var(--text); }
.card-battery-power.idle { color: var(--text-secondary); }

/* Grid indicator */
.grid-indicator {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.grid-indicator .icon-grid {
  width: 24px;
  height: 24px;
}
.grid-indicator.on .icon-grid {
  filter: brightness(0) saturate(100%) invert(58%) sepia(64%) saturate(480%) hue-rotate(90deg) brightness(96%) contrast(92%);
}
.grid-indicator.off .icon-grid {
  filter: brightness(0) saturate(100%) invert(50%) brightness(120%);
  opacity: 0.4;
}
.grid-indicator.offline .icon-grid {
  filter: brightness(0) saturate(100%) invert(20%) sepia(95%) saturate(5000%) hue-rotate(0deg) brightness(95%) contrast(105%);
}
.grid-time {
  font-size: 0.75rem;
  margin-left: 4px;
  white-space: nowrap;
  color: var(--text-secondary);
}
.grid-time.off { color: var(--text-secondary); }
.grid-time.on { color: var(--text-secondary); }

/* Metric tag label */
.metric-tag {
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-left: 6px;
}

/* Battery SOC bar */
.soc-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.soc-bar {
  flex: 1;
  height: 8px;
  background: var(--soc-bg);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}
.soc-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--blue);
  transition: width 0.4s ease;
}
.soc-segments {
  position: absolute;
  inset: 0;
  display: flex;
  gap: 2px;
  pointer-events: none;
}
.soc-segments span {
  flex: 1;
  border-right: 1px solid var(--bg-card);
}
.soc-segments span:last-child {
  border-right: none;
}
.soc-fill.low { background: var(--red); }
.soc-fill.mid { background: var(--orange); }
.soc-fill.grid-on { background: var(--green); }
.soc-fill.grid-on.mid { background: #eab308; }
.soc-fill.grid-on.low { background: var(--red); }
.soc-label {
  font-size: 0.875rem;
  font-weight: 600;
  min-width: 40px;
  text-align: right;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ── Detail View ── */
#detail-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  padding: 24px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.metric-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.metric-value {
  font-size: 1.75rem;
  font-weight: 700;
}
.metric-unit {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

#metric-generation .metric-value { color: var(--green); }
#metric-consumption .metric-value { color: var(--orange); }
#metric-battery-power .metric-value { color: var(--blue); }
#metric-soc .metric-value { color: var(--blue); }

#detail-chart-container {
  padding: 0 24px 24px;
}
#detail-chart-container h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
}
#history-chart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  max-height: 350px;
}

/* ── Table View ── */
#station-table {
  padding: 0 24px 24px;
}
#station-table table {
  width: 100%;
  border-collapse: collapse;
}
#station-table th {
  text-align: left;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
#station-table th[data-sort]::after {
  content: '⇅';
  margin-left: 4px;
  opacity: 0.3;
  font-size: 0.625rem;
}
#station-table th.sort-asc::after {
  content: '▲';
  opacity: 1;
}
#station-table th.sort-desc::after {
  content: '▼';
  opacity: 1;
}
#station-table th:hover {
  color: var(--text);
}
#station-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  vertical-align: middle;
}
#station-table tbody tr {
  cursor: pointer;
  transition: background 0.1s;
}
#station-table tbody tr:hover {
  background: var(--soc-bg);
}
.row-offline {
  opacity: 0.5;
}
.offline-badge {
  color: var(--red);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 8px;
  letter-spacing: 0.5px;
}

/* ── Auth Pages ── */
.auth-container {
  max-width: 400px;
  margin: 80px auto;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.auth-container h1 {
  font-size: 1.5rem;
  margin-bottom: 8px;
  text-align: center;
}
.auth-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.form-group input {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}
.form-group input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
.btn-primary {
  width: 100%;
  padding: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 8px;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.form-error {
  color: var(--red);
  font-size: 0.85rem;
  padding: 8px 12px;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 6px;
  margin-bottom: 12px;
}
.form-success {
  color: var(--green);
  font-size: 0.85rem;
  padding: 8px 12px;
  background: rgba(34, 197, 94, 0.1);
  border-radius: 6px;
  margin-bottom: 12px;
}
.auth-footer {
  text-align: center;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.auth-footer a { color: var(--blue); text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }

/* ── Deye Auth Error Banner ── */
.auth-error-banner {
  background: rgba(239, 68, 68, 0.1);
  color: var(--red);
  padding: 12px 24px;
  font-size: 0.875rem;
  text-align: center;
  border-bottom: 1px solid var(--red);
}
.auth-error-banner a { color: var(--red); font-weight: 600; }

/* ── Settings Page ── */
.settings-container {
  max-width: 700px;
  margin: 24px auto;
  padding: 0 24px;
}
.settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}
.settings-section h2 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}
.settings-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
#config-table {
  width: 100%;
  border-collapse: collapse;
}
#config-table th {
  text-align: left;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
}
#config-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
#config-table input[type="number"] {
  width: 100px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.875rem;
}
#config-table input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}
.btn-save {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--blue);
  background: none;
  border: 1px solid var(--blue);
  border-radius: 6px;
  cursor: pointer;
}
.btn-save:hover { background: rgba(59, 130, 246, 0.1); }
.btn-save:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Header Buttons (settings, logout) ── */
#settings-btn, #logout-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}
#settings-btn:hover, #logout-btn:hover { background: var(--border); }

.back-link {
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.back-link:hover { background: var(--border); }

/* ── Responsive ── */
@media (max-width: 640px) {
  #station-grid { padding: 12px; gap: 12px; }
  #detail-metrics { padding: 12px; }
  #detail-chart-container { padding: 0 12px 12px; }
  header { padding: 12px 16px; }
  #station-table { padding: 0 8px 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  #station-table table { min-width: 360px; }
  #station-table th { padding: 6px 6px; font-size: 0.625rem; letter-spacing: 0; }
  #station-table td { padding: 8px 6px; font-size: 0.8rem; }
  #station-table th[data-sort]::after { margin-left: 2px; }
  .offline-badge { margin-left: 4px; }
}